Nonlinear excitation of the ablative Rayleigh-Taylor instability for all wave numbers
Abstract
Small-scale perturbations in the ablative Rayleigh-Taylor instability (ARTI) are often neglected because they are linearly stable when their wavelength is shorter than a linear cutoff. Using 2D and 3D numerical simulations, it is shown that linearly stable modes of any wavelength can be destabilized. This instability regime requires finite amplitude initial perturbations and linearly stable ARTI modes are more easily destabilized in 3D than in 2D. In conclusion, it is shown that for conditions found in laser fusion targets, short wavelength ARTI modes are more efficient at driving mixing of ablated material throughout the target since the nonlinear bubble density increases with the wave number and small scale bubbles carry a larger mass flux of mixed material.
- Authors:
-
- Univ. of Rochester, Rochester, NY (United States)
- Univ. of Science and Technology of China, Hefei (China)
- Publication Date:
- Research Org.:
- Univ. of Rochester, NY (United States). Lab. for Laser Energetics
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA)
- OSTI Identifier:
- 1417637
- Alternate Identifier(s):
- OSTI ID: 1417077
- Report Number(s):
- 2017-162, 1368
Journal ID: ISSN 2470-0045; PLEEE8; 2017-162, 2324, 1368; TRN: US1801088
- Grant/Contract Number:
- NA0001944; SC0014318; AC02-06CH11357; 20150568ER
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review E
- Additional Journal Information:
- Journal Volume: 97; Journal Issue: 1; Journal ID: ISSN 2470-0045
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
Citation Formats
Zhang, H., Betti, R., Gopalaswamy, V., Yan, R., and Aluie, H. Nonlinear excitation of the ablative Rayleigh-Taylor instability for all wave numbers. United States: N. p., 2018.
Web. doi:10.1103/PhysRevE.97.011203.
Zhang, H., Betti, R., Gopalaswamy, V., Yan, R., & Aluie, H. Nonlinear excitation of the ablative Rayleigh-Taylor instability for all wave numbers. United States. https://doi.org/10.1103/PhysRevE.97.011203
Zhang, H., Betti, R., Gopalaswamy, V., Yan, R., and Aluie, H. Tue .
"Nonlinear excitation of the ablative Rayleigh-Taylor instability for all wave numbers". United States. https://doi.org/10.1103/PhysRevE.97.011203. https://www.osti.gov/servlets/purl/1417637.
@article{osti_1417637,
title = {Nonlinear excitation of the ablative Rayleigh-Taylor instability for all wave numbers},
author = {Zhang, H. and Betti, R. and Gopalaswamy, V. and Yan, R. and Aluie, H.},
abstractNote = {Small-scale perturbations in the ablative Rayleigh-Taylor instability (ARTI) are often neglected because they are linearly stable when their wavelength is shorter than a linear cutoff. Using 2D and 3D numerical simulations, it is shown that linearly stable modes of any wavelength can be destabilized. This instability regime requires finite amplitude initial perturbations and linearly stable ARTI modes are more easily destabilized in 3D than in 2D. In conclusion, it is shown that for conditions found in laser fusion targets, short wavelength ARTI modes are more efficient at driving mixing of ablated material throughout the target since the nonlinear bubble density increases with the wave number and small scale bubbles carry a larger mass flux of mixed material.},
doi = {10.1103/PhysRevE.97.011203},
journal = {Physical Review E},
number = 1,
volume = 97,
place = {United States},
year = {Tue Jan 16 00:00:00 EST 2018},
month = {Tue Jan 16 00:00:00 EST 2018}
}
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Works referencing / citing this record:
Two mode coupling of the ablative Rayleigh-Taylor instabilities
journal, March 2019
- Xin, J.; Yan, R.; Wan, Z. -H.
- Physics of Plasmas, Vol. 26, Issue 3
Baropycnal Work: A Mechanism for Energy Transfer across Scales
journal, May 2019
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